Automatic riveting equipment for cooling fin manufacturing and using method

Abstract

The invention relates to the technical field of cooling fin riveting equipment, and discloses automatic riveting equipment for cooling fin manufacturing and a using method, and the automatic riveting equipment for cooling fin manufacturing comprises a workbench; the station switching unit rotates in a preset direction to switch a plurality of riveting stations; the workpiece supply unit, the feeding unit, the riveting unit and the discharging unit are sequentially arranged around the station switching unit, the workpiece supply unit is used for distributing cooling fins to riveting stations, the feeding unit distributes pins to the cooling fins, and the riveting unit is used for riveting the pins to the cooling fins; the station switching unit drives to-be-riveted cooling fins to switch stations in sequence, the to-be-riveted cooling fins pass through the workpiece supply unit, the feeding unit and the riveting unit in sequence, feeding and riveting operation on pins is completed, and finally the complete operation of discharging of the riveted cooling fins is achieved through the discharging unit. And non-stop production can be realized through sequential operation, the riveting precision and the working efficiency are improved, and the personnel safety is ensured.

Description

An automatic riveting device for heat sink manufacturing and its usage method Technical Field

[0001] This invention relates to the field of heat sink riveting equipment technology, specifically to an automatic riveting device and its usage method for heat sink manufacturing. Background Technology

[0002] Electronic products generate a lot of heat during use. To protect and ensure the performance and lifespan of the components in electronic products, heat sinks are usually added. Heat sinks are usually fixed by pins. To further reduce the space occupied by the heat sink in electronic products, there is a small fixing piece (i.e., a pin) on the heat sink. However, because the fixing piece is small, when it is integrally formed with the heat sink, the pin is easy to be damaged or fall off, resulting in a high defect rate of the heat sink. Moreover, the pin position cannot be adjusted at any time according to actual production needs, and the pin is not very flexible. Therefore, the pin is generally not integrally formed with the heat sink, but is riveted to the heat sink later.

[0003] In existing technologies, heat sink rivets are typically stamped onto the heat sink first, and then the pins are manually attached to the heat sink before being stamped and fixed. This process has a low degree of automation, which affects production efficiency. Moreover, because it is done manually, the fixing position is often inaccurate, the fixing is unstable, and the pins are prone to falling off, which has an adverse effect on the subsequent fixing of the heat sink.

[0004] In addition, during the process of fixing the heat sink and the pin, the traditional manual method is to press the heat sink and the pin together. If you are not careful, the stamping part will cause irreversible stamping damage to the artificial finger, which can easily cause personal injury to the worker. Moreover, the noise generated by the machine will have an adverse effect on the worker's health. Therefore, it is necessary to develop an operating device with high safety and low noise pollution. Summary of the Invention

[0005] This invention provides an automatic riveting device and method for manufacturing heat sinks. The device uses a station switching unit to sequentially switch stations with the heat sink to be riveted, passing through a workpiece supply unit, a feeding unit, and a riveting unit in sequence to complete the feeding and riveting operations of the pins. Finally, the device uses a unloading unit to unload the riveted heat sink. This invention solves the problems of low installation efficiency, low accuracy, and poor safety mentioned in the background art.

[0006] This invention provides the following technical solution:

[0007] An automatic riveting device for manufacturing heat sinks includes: a worktable; a station switching unit disposed on the worktable, the station switching unit having multiple riveting stations, the station switching unit rotating in a preset direction to switch between the multiple riveting stations; and a workpiece supply unit, a feeding unit, a riveting unit, and a unloading unit arranged sequentially around the station switching unit, wherein the workpiece supply unit is used to deliver heat sinks to the riveting stations, the feeding unit delivers pins to a first side and a second side of the heat sink respectively, and the riveting unit is used to rivet the pins on the first side and the second side onto the heat sink.

[0008] As a preferred embodiment of the present invention, the feeding unit includes a first-side feeding unit and a second-side feeding unit, and the riveting unit includes a first-side riveting unit and a second-side riveting unit, with the first-side riveting unit disposed between the first-side feeding unit and the second-side feeding unit.

[0009] As a preferred embodiment of the present invention, both the first side feeding unit and the second side feeding unit include: a first vibrating feeding plate, the output end of which has a feeding platform; a first mechanical gripper, which has horizontal and vertical degrees of freedom of movement, for gripping the pins on the feeding platform and moving them to one side of the heat sink; wherein the first mechanical gripper includes a first gripper cylinder, the output end of which is slidably connected to two sets of first clamping blocks, and when the two sets of first clamping blocks approach each other, clamping force is applied to both sides of the pins; and a pre-riveting block, which is disposed on either side of the two sets of first clamping blocks, the movement direction of the pre-riveting block being perpendicular to the movement direction of the first clamping blocks, for applying a first pre-tightening force to the pins.

[0010] As a preferred embodiment of the present invention, the first side loading unit and the second side loading unit further include: a first bracket installed on the workbench, a first translation stage slidably connected to the first bracket, wherein a first cylinder is fixedly connected to the first bracket, and the output end of the first cylinder is connected to the first translation stage; a first lifting stage is disposed on the first translation stage, a first mechanical gripper and a pre-riveting block are both disposed on the first lifting stage, wherein a second cylinder is fixedly connected to the first translation stage, and the output end of the second cylinder is connected to the first lifting stage.

[0011] As a preferred embodiment of the present invention, both the first-side riveting unit and the second-side riveting unit include a third bracket mounted on a workbench. A third lifting platform is provided on the third bracket, and a riveting rod is mounted on the third lifting platform. A third cylinder is mounted on the third bracket, and the output end of the third cylinder is connected to the third lifting platform. When the third cylinder extends, a second preload is applied to the pin through the riveting rod.

[0012] As a preferred embodiment of the present invention, the workpiece supply unit includes: a second vibrating feeding plate, the output end of which is provided with a feeding guide rail; a rotary table having horizontal and vertical degrees of freedom of movement, and a second mechanical gripper provided on the rotary table. The second mechanical gripper is used to grab the heat sink on the feeding guide rail and move it to the riveting station. The second mechanical gripper includes a second gripper cylinder fixedly connected to the rotary table. The output end of the second gripper cylinder is slidably connected to two sets of second clamping blocks. When the second gripper cylinder operates, the two sets of second clamping blocks move closer to or further away from each other.

[0013] As a preferred embodiment of the present invention, the workpiece supply unit further includes a second bracket mounted on a workbench, a second translation stage slidably connected to the second bracket, a second lifting stage disposed on the second translation stage, and a rotary stage disposed on the second lifting stage. A fourth cylinder is mounted on the second bracket, the output end of the fourth cylinder is connected to the second translation stage, a fifth cylinder is mounted on the second translation stage, the output end of the fifth cylinder is connected to the second lifting stage, and a rotary cylinder is mounted on the second lifting stage, the output end of the rotary cylinder is connected to the rotary stage.

[0014] As a preferred embodiment of the present invention, the unloading unit includes: a fourth support mounted on a workbench, a third horizontally movable translation platform mounted on the fourth support, a fourth lifting platform mounted on the third translation platform, a third gripper cylinder mounted on the fourth lifting platform, and two sets of third clamping blocks mounted on the output end of the third gripper cylinder for clamping the riveted heat sink; a sixth cylinder fixedly connected to the fourth support, the output end of the sixth cylinder connected to the third translation platform, and a seventh cylinder mounted on the third translation platform, the output end of the seventh cylinder connected to the fourth lifting platform; and a guide chute fixedly connected to the workbench for receiving and conveying the riveted heat sink.

[0015] As a preferred embodiment of the present invention, the workstation switching unit includes: a workstation drive disk rotatably connected to the workbench, with multiple riveting workstations equidistantly distributed on the workstation drive disk in a circular pattern; wherein a motor is installed inside the workbench, a gearbox is installed on the top of the workbench, the output end of the motor is rotatably connected to the input end of the gearbox, and the workstation drive disk is located at the output end of the gearbox; and a support platform fixedly connected to the top of the workbench, with the riveting workstations extending onto the support platform and fitting against the top surface of the support platform.

[0016] A method of using an automatic riveting device for manufacturing heat sinks includes the following steps: Step 1: A workpiece supply unit places the heat sink onto the riveting station; Step 2: A station switching unit transfers the placed heat sink to a feeding unit, which delivers the pins to both sides of the heat sink and applies a first preload; Step 3: The station switching unit transfers the heat sink with the pins to the riveting unit, which applies a second preload to the pins to fix them onto the heat sink; Step 4: The station switching unit transfers the heat sink with the pins fixed to the unloading unit, which removes the riveted heat sink; Step 5: The station switching unit continues to rotate, repeating steps 1 to 4.

[0017] Compared with the prior art, the present invention provides an automatic riveting device and method for manufacturing heat sinks, which has the following beneficial effects: 1. In the automatic riveting device for manufacturing heat sinks, by riveting one side first and then the other side, the heat sink can be riveted on both sides, which can ensure the observability of the riveting process and the timely termination of riveting defects. If there is a defect in the riveting of the first side, the riveting of the second side can be skipped directly to prevent waste of parts and processes.

[0018] 2. In the automatic riveting equipment and method for manufacturing heat sinks, the pre-riveting block is pushed up and down by the force-applying cylinder. The main purpose is to apply a first pre-tightening force to the pin when it moves down. On the one hand, the downward movement of the pre-riveting block can effectively separate the pin from the first clamping block. On the other hand, the downward pressure of the pre-riveting block can initially press the pin onto the protrusion at the riveting position of the heat sink, preventing the pin from coming off when switching work stations, and ensuring the effective execution of the riveting process.

[0019] All parts not covered in this device are the same as or can be implemented using existing technologies. This invention uses a station switching unit to sequentially switch stations with the heat sink to be riveted, passing through the workpiece supply unit, feeding unit, and riveting unit in sequence to complete the feeding and riveting operations of the pins. Finally, the unloading unit completes the unloading operation of the riveted heat sink. The sequential operation can achieve non-stop production, improve riveting accuracy and work efficiency, and ensure personnel safety. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0021] Figure 1 is a three-dimensional schematic diagram of the present invention; Figure 2 is a plan view of the workstation switching unit of the present invention; Figure 3 is a three-dimensional schematic diagram of the workstation switching unit of the present invention; Figure 4 is a three-dimensional schematic diagram of the workpiece supply unit of the present invention; Figure 5 is a three-dimensional schematic diagram of the feeding unit of the present invention; Figure 6 is a partial three-dimensional schematic diagram of the feeding unit of the present invention; Figure 7 is a three-dimensional schematic diagram of the riveting unit of the present invention; Figure 8 is a three-dimensional schematic diagram of the unloading unit of the present invention.

[0022] In the diagram: 10. Workbench; 11. Support platform; 20. Station switching unit; 21. Motor; 22. Transmission unit; 23. Gearbox; 24. Station drive plate; 25. Riveting station; 30. Workpiece supply unit; 31. Second bracket; 32. Second translation stage; 320. Fourth cylinder; 33. Second lifting platform; 330. Fifth cylinder; 34. Rotary table; 340. Rotary cylinder; 35. Second gripper cylinder; 350. Second clamping block; 36. Second vibrating feeding plate; 360. Material conveying guide rail; 40. First side feeding unit; 41. First bracket; 42. Second translation stage; 420. First cylinder; 43. First lifting platform; 44. 0. Second cylinder; 44. First gripper cylinder; 440. First clamping block; 45. Force-applying cylinder; 450. Pre-riveting block; 46. First vibrating feeding plate; 460. Feeding guide rail; 47. Feeding platform; 470. Pushing cylinder; 50. First side riveting unit; 51. Third bracket; 52. Third lifting platform; 520. Third cylinder; 53. Riveting rod; 60. Unloading unit; 61. Fourth bracket; 62. Third translation platform; 620. Sixth cylinder; 63. Fourth lifting platform; 630. Seventh cylinder; 64. Third gripper cylinder; 640. Third clamping block; 65. Guide groove; 70. Second side feeding unit; 80. Second side riveting unit. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Referring to Figures 1-8, an automatic riveting device for heat sink manufacturing includes: a box-type workbench 10; a station switching unit 20 installed on the workbench 10, the station switching unit 20 being provided with multiple riveting stations 25, the station switching unit 20 rotating in a preset clockwise or counterclockwise direction to switch the positions of the multiple riveting stations 25, thereby realizing sequential processing of the workpieces on the riveting stations 25; a workpiece supply unit 30, a loading unit, a riveting unit, and an unloading unit 60 are arranged sequentially around the station switching unit 20. The workpiece supply unit 30 is used to deliver heat sinks to the riveting stations 25 for subsequent processing. The loading unit delivers the pins to be riveted onto the heat sink to the first side and the second side of the heat sink, which are the installation and riveting positions of the heat sink. The riveting unit is used to rivet the pins assigned to the first side and the second side onto the heat sink. The unloading unit 60 removes the riveted heat sink from the station switching unit 20 and transfers it to the finished product storage position.

[0025] In the above scheme, the workstation switching unit 20 carries the heat sink to be riveted and sequentially switches workstations, passing through the workpiece supply unit 30, the feeding unit and the riveting unit in sequence to complete the feeding and riveting operations of the pins. Finally, the unloading unit 60 completes the unloading operation of the riveted heat sink. The sequential operation can realize non-stop production, improve riveting accuracy and work efficiency, and ensure personnel safety.

[0026] In some embodiments, the feeding unit includes a first-side feeding unit 40 and a second-side feeding unit 70, and the riveting unit includes a first-side riveting unit 50 and a second-side riveting unit 80. The first-side riveting unit 50 is disposed between the first-side feeding unit 40 and the second-side feeding unit 70. This method mainly achieves side-by-side feeding and riveting of the heat sink by riveting one side at a time, which can ensure the observability of the riveting process and timely termination of riveting defects. If there is a defect in the first-side riveting, the second-side riveting is skipped directly to prevent waste of parts and processes. In other embodiments, the pins on both sides can be connected by a set of feeding units, and then the pins on both sides can be riveted sequentially by the riveting unit. This method can reduce the number of tooling structures, thereby saving the manufacturing cost of the equipment.

[0027] In some embodiments, the first side feeding unit 40 and the second side feeding unit 70 have the same type of structure, specifically including: a first vibrating feeding plate 46, the output end of the first vibrating feeding plate 46 having a feeding platform 47, specifically, the outlet of the first vibrating feeding plate 46 has a feeding guide rail 460, the feeding guide rail 460 has a guide channel with a cross-sectional shape of "L", the pins are conveyed in the guide channel in a preset direction, the feeding platform 47 is located at the end of the feeding guide rail 460, and a pushing cylinder 470 is also installed at the end of the feeding guide rail 460, the pushing cylinder 470 pushes the pins to the picking port of the feeding platform 47, so that the first mechanical gripper can grasp them. The first mechanical gripper, which has horizontal and vertical degrees of freedom of movement, grasps the pins on the feeding platform 47 and moves them to one side of the heat sink. Specifically, the first mechanical gripper includes a first gripper cylinder 44, the output end of the first gripper cylinder 44 is slidably connected to two The first clamping blocks 440 are driven by the first gripper cylinder 44 to move closer or further apart. When the two sets of first clamping blocks 440 move closer together, a clamping force is applied to both sides of the insert, thereby removing the insert from the loading table 47. Additionally, a pre-riveting block 450 is provided on the same side of both sets of first clamping blocks 440. The moving direction of the pre-riveting block 450 is perpendicular to the moving direction of the first clamping blocks 440. When the pin is released to the designated side of the heat sink, the pre-riveting block 450 is pushed up and down by the force-applying cylinder 45. The main purpose of the downward movement is to apply a first pre-tightening force to the pin. On the one hand, the downward movement of the pre-riveting block 450 can effectively separate the pin from the first clamping block 440. On the other hand, the downward pressure of the pre-riveting block 450 can initially press the pin onto the protrusion at the riveting position of the heat sink, preventing the pin from coming off during the work station switch and ensuring the effective progress of the riveting process.

[0028] In some embodiments, the first side loading unit 40 and the second side loading unit 70 further include: a first bracket 41 mounted on the workbench 10, a first translation stage 42 slidably connected to the first bracket 41, a first cylinder 420 fixedly connected to the first bracket 41, and the output end of the first cylinder 420 connected to the first translation stage 42; a first lifting stage 43 disposed on the first translation stage 42, a first mechanical gripper and a force-applying cylinder 45 both mounted on the first lifting stage 43, a pre-riveting block 450 mounted on the output end of the force-applying cylinder 45, and a second cylinder 430 fixedly connected to the first translation stage 42, the output end of the second cylinder 430 connected to the first lifting stage 43.

[0029] In some embodiments, the first side riveting unit 50 and the second side riveting unit 80 have the same type of structure, specifically including a third bracket 51 installed on the workbench 10, a third lifting platform 52 provided on the third bracket 51, a riveting rod 53 installed on the third lifting platform 52, a third cylinder 520 installed on the third bracket 51, and the output end of the third cylinder 520 connected to the third lifting platform 52. When the third cylinder 520 extends, a second preload is applied to the pin through the riveting rod 53, thereby stably riveting the pin to the heat sink.

[0030] In some embodiments, the workpiece supply unit 30 includes: a second vibrating feeding plate 36, the output end of which is provided with a feeding guide rail 360, the feeding guide rail 360 having a "convex" shaped cross-section that matches the shape of the heat sink to ensure that the heat sink does not tilt during movement; and a rotary table 34 having horizontal and vertical degrees of freedom of movement, on which a second mechanical gripper is provided, that is, the second mechanical gripper can move horizontally and vertically and also has 360° rotation capability. The rotational motion allows the second mechanical gripper to grasp the heat sink on the material conveying guide rail 360 and move it to the riveting station 25. The second mechanical gripper includes a second gripper cylinder 35 fixedly connected to the rotary table 34. The output end of the second gripper cylinder 35 is slidably connected to two sets of second clamping blocks 350. The second gripper cylinder 35 can drive the two sets of second clamping blocks 350 to move closer or further apart. When the two sets of second clamping blocks 350 move closer together, they can clamp the heat sink, thereby transferring the heat sink to the riveting station 25 through the second mechanical gripper.

[0031] In some embodiments, the workpiece supply unit 30 further includes a second support 31 mounted on the worktable 10, a second translation stage 32 slidably connected to the second support 31, a second lifting stage 33 disposed on the second translation stage 32, a rotary stage 34 disposed on the second lifting stage 33, a fourth cylinder 320 mounted on the second support 31, the output end of the fourth cylinder 320 being connected to the second translation stage 32 to control the horizontal movement of the second mechanical gripper, a fifth cylinder 330 mounted on the second translation stage 32, the output end of the fifth cylinder 330 being connected to the second lifting stage 33 to control the vertical movement of the second mechanical gripper, and a rotary cylinder 340 mounted on the second lifting stage 33, the output end of the rotary cylinder 340 being connected to the rotary stage 34 to control the rotation of the second mechanical gripper.

[0032] In some embodiments, the unloading unit 60 includes: a fourth support 61 disposed on the worktable 10; a third translation stage 62 with horizontal displacement disposed on the fourth support 61; a fourth lifting stage 63 disposed on the third translation stage 62; a third gripper cylinder 64 disposed on the fourth lifting stage 63; two sets of third clamping blocks 640 disposed at the output end of the third gripper cylinder 64 for clamping the riveted heat sink; a sixth cylinder 620 fixedly connected to the fourth support 61; the output end of the sixth cylinder 620 connected to the third translation stage 62 for controlling the horizontal movement of the third gripper cylinder 64; a seventh cylinder 630 disposed on the third translation stage 62; the output end of the seventh cylinder 630 connected to the fourth lifting stage 63 for controlling the vertical movement of the third gripper cylinder 64, so as to remove the riveted heat sink from the riveting station 25; and a guide chute 65 fixedly connected to the worktable 10 for receiving and conveying the riveted heat sink.

[0033] In some embodiments, the workstation switching unit 20 includes: a workstation drive disk 24 rotatably connected to the worktable 10; multiple riveting stations 25 are circumferentially and equidistantly distributed on the workstation drive disk 24; a motor 21 is installed inside the worktable 10; a gearbox 23 is installed on the top of the worktable 10; the output end of the motor 21 is rotatably connected to the input end of the gearbox 23; specifically, the motor 21 is rotatably connected to the gearbox 23 through a transmission unit 22, where the transmission unit 22 is a gear belt or chain to ensure transmission accuracy; the workstation drive disk 24 is located at the output end of the gearbox 23; a circular support platform 11 is fixedly connected to the top of the worktable 10; the riveting stations 25 extend onto the support platform 11 and are in contact with the top surface of the support platform 11; during riveting operations, the support platform 11 provides stable support for the riveting stations 25, ensuring the accuracy of the riveting force.

[0034] A method of using an automatic riveting device for manufacturing heat sinks includes the following steps: Step 1: The workpiece supply unit 30 places the heat sink onto the riveting station 25; Step 2: The station switching unit 20 transfers the placed heat sink to the loading unit, which delivers the pins to both sides of the heat sink and applies a first preload; Step 3: The station switching unit 20 transfers the heat sink with the pins to the riveting unit, which applies a second preload to the pins to fix them onto the heat sink; Step 4: The station switching unit 20 transfers the heat sink with the pins fixed to the unloading unit 60, which removes the riveted heat sink; Step 5: The station switching unit 20 continues to rotate, repeating steps 1 to 4.

[0035] In other usage methods, the specific operating steps may be as follows: Step 1: The workpiece supply unit 30 places the heat sink onto the riveting station 25; Step 2: The station switching unit 20 transfers the placed heat sink to the first side loading unit 40, which delivers the pins to one side of the heat sink and applies a first preload; Step 3: The station switching unit 20 transfers the heat sink with the pins to the first side riveting unit 50, which applies a second preload to the pins to fix them onto the heat sink; Step 4: The station switching unit 20 completes one step... Step 1: The heat sink on one side is transferred to the second side loading unit 70. The second side loading unit 70 delivers the pins to the other side of the heat sink and applies a first pre-tightening force. Step 2: The station switching unit 20 transfers the heat sink with the pins to the second side riveting unit 80. The second side riveting unit 80 applies a second pre-tightening force to the pins to fix them to the heat sink. Step 3: The station switching unit 20 transfers the heat sink with the pins fixed to the unloading unit 60. The unloading unit 60 removes the riveted heat sink. Step 4: The station switching unit 20 continues to rotate and repeats steps 1 to 6.

[0036] Components not described in detail in this article are existing technologies.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic riveting device for manufacturing heat sinks, characterized in that, include: Workbench (10); a station switching unit (20) is set on the workbench (10), and the station switching unit (20) is provided with multiple riveting stations (25). The station switching unit (20) rotates in a preset direction to switch multiple riveting stations (25); a workpiece supply unit (30), a feeding unit, a riveting unit and a unloading unit (60) are arranged in sequence around the station switching unit (20). The workpiece supply unit (30) is used to deliver the heat sink to the riveting station (25), the feeding unit delivers the pins to the first side and the second side of the heat sink respectively, and the riveting unit is used to rivet the pins on the first side and the second side onto the heat sink.

2. The automatic riveting equipment for manufacturing heat sinks according to claim 1, characterized in that, The feeding unit includes a first side feeding unit (40) and a second side feeding unit (70), and the riveting unit includes a first side riveting unit (50) and a second side riveting unit (80). The first side riveting unit (50) is disposed between the first side feeding unit (40) and the second side feeding unit (70).

3. The automatic riveting equipment for manufacturing heat sinks according to claim 2, characterized in that, Both the first side feeding unit (40) and the second side feeding unit (70) include: a first vibrating feeding plate (46), the output end of which has a feeding platform (47); a first mechanical gripper, which has horizontal and vertical degrees of freedom of movement, used to grip the pin on the feeding platform (47) and move it to one side of the heat sink; wherein, the first mechanical gripper includes a first gripper cylinder (44), the output end of which is slidably connected to two sets of first clamping blocks (440), when the two sets of first clamping blocks (440) approach each other, clamping force is applied to both sides of the pin; a pre-riveting block (450), which is set on either side of the two sets of first clamping blocks (440), the moving direction of the pre-riveting block (450) is perpendicular to the moving direction of the first clamping block (440), used to apply a first pre-tightening force to the pin.

4. The automatic riveting equipment for manufacturing heat sinks according to claim 3, characterized in that, The first side loading unit (40) and the second side loading unit (70) further include: a first bracket (41) installed on the workbench (10), a first translation stage (42) slidably connected on the first bracket (41), wherein a first cylinder (420) is fixedly connected on the first bracket (41), and the output end of the first cylinder (420) is connected to the first translation stage (42); a first lifting stage (43) set on the first translation stage (42), wherein a first mechanical gripper and a pre-riveting block (450) are both set on the first lifting stage (43), wherein a second cylinder (430) is fixedly connected on the first translation stage (42), and the output end of the second cylinder (430) is connected to the first lifting stage (43).

5. The automatic riveting equipment for manufacturing heat sinks according to claim 2, characterized in that, Both the first side riveting unit (50) and the second side riveting unit (80) include a third bracket (51) installed on the workbench (10). A third lifting platform (52) is provided on the third bracket (51), and a riveting rod (53) is installed on the third lifting platform (52). A third cylinder (520) is installed on the third bracket (51), and the output end of the third cylinder (520) is connected to the third lifting platform (52). When the third cylinder (520) extends, a second preload is applied to the pin through the riveting rod (53).

6. The automatic riveting equipment for manufacturing heat sinks according to claim 1, characterized in that, The workpiece supply unit (30) includes: a second vibrating feed plate (36), the output end of which is provided with a feeding guide rail (360); a rotary table (34), which has horizontal and vertical degrees of freedom of movement, and a second mechanical gripper is provided on the rotary table (34). The second mechanical gripper is used to grab the heat sink on the feeding guide rail (360) and move it to the riveting station (25). The second mechanical gripper includes a second gripper cylinder (35) fixedly connected to the rotary table (34). The output end of the second gripper cylinder (35) is slidably connected with two sets of second clamping blocks (350). When the second gripper cylinder (35) operates, the two sets of second clamping blocks (350) move closer to each other or further away.

7. The automatic riveting equipment for manufacturing heat sinks according to claim 6, characterized in that, The workpiece supply unit (30) also includes a second support (31) mounted on the worktable (10), a second translation stage (32) slidably connected to the second support (31), a second lifting stage (33) provided on the second translation stage (32), and a rotary table (34) provided on the second lifting stage (33). A fourth cylinder (320) is mounted on the second support (31), the output end of the fourth cylinder (320) is connected to the second translation stage (32), a fifth cylinder (330) is mounted on the second translation stage (32), the output end of the fifth cylinder (330) is connected to the second lifting stage (33), and a rotary cylinder (340) is mounted on the second lifting stage (33), the output end of the rotary cylinder (340) is connected to the rotary table (34).

8. The automatic riveting equipment for manufacturing heat sinks according to claim 1, characterized in that, The unloading unit (60) includes: a fourth support (61) set on the workbench (10), a third translation stage (62) with horizontal displacement set on the fourth support (61), a fourth lifting stage (63) set on the third translation stage (62), a third gripper cylinder (64) set on the fourth lifting stage (63), and two sets of third clamping blocks (640) set on the output end of the third gripper cylinder (64) for clamping the riveted heat sink. A sixth cylinder (620) is fixedly connected on the fourth support (61), and the output end of the sixth cylinder (620) is connected to the third translation stage (62). A seventh cylinder (630) is set on the third translation stage (62), and the output end of the seventh cylinder (630) is connected to the fourth lifting stage (63). A guide chute (65) fixedly connected on the workbench (10) is used to receive and transport the riveted heat sink.

9. An automatic riveting device for manufacturing heat sinks according to claim 1, characterized in that, The workstation switching unit (20) includes: a workstation drive disk (24) rotatably connected to the worktable (10), and multiple riveting workstations (25) are circumferentially distributed on the workstation drive disk (24). The worktable (10) is equipped with a motor (21), and a gearbox (23) is installed on the top of the worktable (10). The output end of the motor (21) is rotatably connected to the input end of the gearbox (23), and the workstation drive disk (24) is located at the output end of the gearbox (23). A support platform (11) is fixedly connected to the top of the worktable (10), and the riveting workstations (25) extend to the support platform (11) and are in contact with the top surface of the support platform (11).

10. A method of using the automatic riveting equipment for manufacturing heat sinks according to any one of claims 1-9, characterized in that, The process includes the following steps: Step 1: The workpiece supply unit (30) places the heat sink on the riveting station (25); Step 2: The station switching unit (20) transfers the placed heat sink to the loading unit, which delivers the pins to both sides of the heat sink and applies a first preload; Step 3: The station switching unit (20) transfers the heat sink with pins to the riveting unit, which applies a second preload to the pins to fix them to the heat sink; Step 4: The station switching unit (20) transfers the heat sink with the pins fixed to the unloading unit (60), which removes the riveted heat sink; Step 5: The station switching unit (20) continues to rotate, repeating steps 1 to 4.

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